“This is the story of how I implemented my own little language and my own little compiler.Writing a compiler is generally thought of as Really Hard, basically rocket surgery. To my surprise I found it quite straightforward, almost pleasant. I sincerely believe most people should do it. Consider this evening a crash course in how to get started writing your own compiler. Compilers are simple “data pipes”, and there are definitely deep aspects to making them, but the basic principles are straightforward.The thing that’s difficult, though, is deciding all the little things about your language. Curly braces or indentation? Will you…”

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Link: http://www.foocafe.org/malmoe/events/1863-how-i-built-a-programming-language